Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Evaluation of Antimicrobial, Antithrombin, and Antioxidant Activity of Aerial Part of Saxifraga stolonifera

호이초(Saxifraga stolonifera) 지상부의 항균, 항혈전 및 항산화 활성 평가

  • Sohn, Ho-Yong (Dept. of Food and Nutrition, Andong National University) ;
  • Ryu, Hee-Young (Dept. of Food and Nutrition, Andong National University) ;
  • Jang, Yu-Jin (Agro-Biotechnology Education Center NURI, Kyungpook National University) ;
  • Jang, Han-Su (Gyeongbuk Institute for Bioindustry) ;
  • Park, Yu-Mi (School of Life Science and Biotechnology, Kyungpook National University) ;
  • Kim, Sa-Youl (School of Life Science and Biotechnology, Kyungpook National University)
  • 손호용 (안동대학교 식품영양학과) ;
  • 류희영 (안동대학교 식품영양학과) ;
  • 장유진 (경북대학교 생물건강농업생명인재양성누리사업단) ;
  • 장한수 (경북바이오산업연구원) ;
  • 박유미 (경북대학교 생명공학부) ;
  • 김사열 (경북대학교 생명공학부)
  • Published : 2008.09.28
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Abstract

Saxifraga stolonifera (Saxifragaceae) is a perennial herbaceous plant growing in Korea, China, Japan and Russia. The aerial part has been used as herbal medicine for treatment of pneumonia, frostbite, inflammation and microbial infection. In this study, fresh juice and methanol extract were prepared from the aerial part of S. stolonifera, and their antimicrobial, antithrombin, and antioxidant activity were evaluated, respectively. The fresh juice showed weak antimicrobial activity against Proteus vulgaris, Escherichia coli O157:H7 and Candida albicans with ignorable DPPH scavenging activity. But, the methanol extract showed strong antioxidant activity ($IC_{50}$ of $37.5{\mu}g/mL$) with minor, broad-range antimicrobial activity. Antithrombin activities were not observed in fresh juice and extract, up to 1.5 mg/mL. Sequential organic solvent fractionation of methanol extract showed that $IC_{50}s$ of ethylacetate and the butanol fraction were 6.9 and $7.8{\mu}g/mL$, respectively, that is comparable with vitamin C or butylated hydroxytoluene. Analysis of component in extract and fractionates suggested that the antioxidants in fractions are diverse and the active substances have glycosylated phenolic structure. Our results suggest that the aerial part of S. stolonifera could be used as the natural source of potential antioxidant.

호이초는 한국, 일본, 중국 및 러시아에서 자생하는 범의 귀과의 다년생풀로, 민간에서는 주로 폐렴, 동상, 피부 염증 및 미생물감염 치료에 사용하여 왔다. 국내에서는 주로 관상용으로 재배되고 있어, 현재까지 재배관련 연구를 제외하고 생리활성 및 성분에 대한 연구는 전무한 상태이다. 본 연구에서는 호이초의 생리활성 평가를 위해 호이초 지상부의 생즙 및 메탄을 추출물을 조제하며 각각 항균, 항혈전 및 항산화 활성을 평가하였다. 지상부 생즙의 경우 Proteus vulgaris, Escherichia coli O157:H7 및 Candida albicans에 대해 항균효과가 인정되었고, 항산화 활성은 미약하였다. 반면 메탄올 추출물의 경우 염증 피부에서 분리한 세균, 일부세균 및 C. albicans에 대해 항균력을 나타내었으며, 강력한 항산화 활성을 나타내었다($IC_{50}$ of $37.5{\mu}g/mL$). 생즙 및 추출물 모두 1.5 mg/mL 농도에서 항혈전 활성은 나타나지 않았다. 메탄올 추출물 및 이의 순차적 유기용매 분획물의 항산화 활성 평가 결과, ethylacetate 및 butanol 분획에서 6.9 및 $7.8{\mu}g/mL$의 $IC_{50}$를 나타내어, vitamin C 및 BHT에 필적할 만한 강력한 항산화 활성을 확인하였다. 각 시료의 성분 분석 결과, 각 분획의 항산화 활성물질은 다양하며, ethylacetate 분획의 경우 항산화물질은 폴리페놀 배당체로 추측된다. 본 연구결과는 국내 자생 호이초가 항산화 식물자원으로 유용하게 개발될 수 있음을 제시하고 있다.

Keywords

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